| 1 | K M Gas Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Dec 2014 |
| 2 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Dec 2024 |
| 3 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Sep 2024 |
| 4 | KCS Medallion Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2018 |
| 5 | KCS Resources, LLC | Houston, TX 77027 | Oil & Gas Operator | Feb 2017 |
| 6 | Kechi Energy LLC | Chickasha, OK 73018 | Oil & Gas Operator | Sep 2024 |
| 7 | Keith F. Walker Oil & Gas Co., LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Oct 2024 |
| 8 | Kelly Jr Walter A Opr Co | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2014 |
| 9 | Ken Snyder Inc | Newalla, OK 74857-7107 | Oil & Gas Operator | Sep 2024 |
| 10 | Kennedy & Mitchell, Inc. | Houston, TX 77084 | Oil & Gas Operator | Aug 2013 |
| 11 | Kenneth W. Cory, LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Sep 2024 |
| 12 | Kepco Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2024 |
| 13 | Kerr McGee Rocky MTN Corp | Denver, CO 80202-5736 | Oil & Gas Operator | Mar 2015 |
| 14 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Jun 2024 |
| 15 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 16 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Dec 2024 |
| 17 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Oct 2024 |
| 18 | Kibtec Oil & Gas Inc | Cashion, OK 73016 | Oil & Gas Operator | Aug 2024 |
| 19 | King Operating Corporation | Fort Worth, TX 76147 | Oil & Gas Operator | Dec 2024 |
| 20 | Kingery Drilling Co., Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Oct 2024 |
| 21 | Kingfisher Resources Inc | Clinton, OK 73601 | Oil & Gas Operator | Oct 2024 |
| 22 | Kirkpatrick Oil Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Dec 2024 |
| 23 | KNG Producers | Dumas, TX 79029 | Oil & Gas Operator | Oct 2009 |
| 24 | Koch Oil Company | | Oil & Gas Operator | May 2017 |
| 25 | Krumme Oil Company LLP | Bristow, OK 74010 | Oil & Gas Operator | Oct 2024 |